FileLab

Watermark PDF

Free

Position custom diagonal text, stamps, or vector logos.

Accepts:pdf
100% Client-SideZero UploadsInstant Processing
🛠️

Tool Interface Coming Soon

The interactive Watermark PDF workspace is being crafted. The full processing engine will be available here — drop files, configure options, and download results.

About Watermark PDF

Position custom diagonal text, stamps, or vector logos. Unlike traditional cloud conversion services, FileLab executes computations directly in your browser using modern WebAssembly (WASM) and HTML5 Canvas APIs. Your private documents, images, and media never leave your device or touch an external server.

Zero Uploads

Files are converted in browser RAM and destroyed immediately upon task completion.

Supported Inputs

.pdf

Completely Free

No credits, no registration, no daily quota limits, no paywalls.